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High quality polycrystalline Er3AlCx (x = 0.8 and 1) system is synthesized using conventional tri arc melting. X-ray diffraction of Er3AlC is analyzed using Rietveld method which reveals single phase formation with Pm-3m cubic perovskite structure. Susceptibility curve indicates antiferromagnetic ordering at Neel temperatureTN=3.1 K. The values of θp and μeff deduced from inverse susceptibility curve are consistent with magnetic ordering temperature and theoretical value for Er3+ ion, respectively. Metamagnetic transition is found at 10 kOe. [ABSTRACT FROM AUTHOR]

Electronic band structure calculations have been carried out for Y3AlZ (Z = B, C, N, O) system to check the possibility of new superconductor. The band structure calculations were carried out by augmented plane wave and local orbital (APW+LO) method using WIEN2K software, based on density functional theory (DFT). Lattice parameters of Y3AlZ system were found with volume optimization. It is observed that lattice parameter decreases with decrease in atomic radii of Z interstitials. Maximum density of states at Fermi level is found for Y3AlB among Y3AlZ system. [ABSTRACT FROM AUTHOR]